How to choose a mobile 4g ​​router?

Question

network hardware

Hello!
I ask for advice on choosing a 4G modem router.
Will be used with macbook pro
It is necessary to be able to use any SIM card
Small size
Good connection
And maybe tell the operator, trips mainly in Russia, no more than 2 times a month for 1-1.5 weeks.

Answer 1

For example, this
https://www.aliexpress.com/item/Original-Unlock-Mo...

Answer 2

Look at the category of LTE Cat 4 and LTE Cat 6, the higher it is, the wider the frequency range of the modem and the higher the speed